Method for eliminating annealing punch marks of cold-rolled steel sheets

Abstract

The invention relates to a method for eliminating annealing punch marks of cold-rolled steel sheets. A plurality of groups of annealing furnace roll sets consisting of rolls with different diameters are arranged in a cold-rolled steel sheet continuous annealing furnace, a plurality of steel sheet automatic skew adjustment control modules correspondingly control the annealing furnace roll sets, namely CPC (computer production control), and the CPC is manually set to control the furnace rolls and adjust the displacement required by the steel sheets; and edges of the steel plates are utilized toremove foreign matters adhered on the surfaces of the furnace rolls. Therefore, the method does not need to increase any equipment and investment, eliminates the punch marks under the condition of noshutdown, can save a value of more than 2 million Yuan because of the decrease of unacceptable products each year, can greatly improve the yield of annealing sets and equipment working rate, and alsocan reduce the loss of waste products each time, improve the quality and the yield of the steel sheets, reduce the labor intensity of workers, and avoid energy waste caused by long-time blowing out.

Description

technical field [0001] The invention belongs to the field of steel rolling heat treatment, and in particular relates to a method for eliminating scab marks on the surface of cold-rolled steel plates during annealing by using a strip steel automatic deviation correction control system. Background technique [0002] The annealing treatment of cold-rolled strip steel is an important part of the cold-rolled sheet production process, and the continuous annealing unit is an important equipment for improving the annealing speed and quality. The continuous annealing unit is a continuous automatic production line composed of multiple sets of furnace rolls with different roll diameters. Each set of furnace rolls is automatically controlled by a corresponding strip steel automatic correction control module, namely CPC, to prevent the belt from being wound on the furnace rolls. Steel running off in continuous annealing run. Because the tail of the previous strip and the head of the nex...

AI Technical Summary

Problems solved by technology

[0003] At the same time, since the area where the gap marks are produced is in the sealed heating furnace area, the only way to eliminate the gap marks on the furnace rollers is to shut down the furnace and start the furnace for treatment. Every time the furnace is turned on, it needs to be shut down for more than 20 hours, which not only increases the labor intensity, but also And produce 60 tons of waste products; and seriously affect the smooth progress of production, reducing the output and product quality of the unit

[0004] After searching, no relevant patent information and relevant data reports were found